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Vulnerability record · CVE-2026-53355 · published 1 July 2026

CVE-2026-53355: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: net: rds: clear i_sends on setup unwind The RDS IB connection teardown path is written so it can run during partial startup and on repeated shutdown attempts. It uses NULL pointers to distinguish resources that are still owned from resources that have already been released. When rds_ib_setup_qp() fails after allocating i_sends but before allocating i_recvs, the sends_out path frees i_sends without clearing the pointer. A later shutdown pass can still treat that stale pointer as a live send ring allocation. Clear i_sends after vfree() in the error unwind path so the existing shutdown logic continues to use the correct ownership state.

9.8 CVSS 3.1 Critical EPSS 0.42% · top 66.1% CWE-476 · NULL pointer dereference
9.8CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
22 Jul 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: net: rds: clear i_sends on setup unwind The RDS IB connection teardown path is written so it can run during partial startup and on repeated shutdown attempts. It uses NULL pointers to distinguish resources that are still owned from resources that have already been released. When rds_ib_setup_qp() fails after allocating i_sends but before allocating i_recvs, the sends_out path frees i_sends without clearing the pointer. A later shutdown pass can still treat that stale pointer as a live send ring allocation. Clear i_sends after vfree() in the error unwind path so the existing shutdown logic continues to use the correct ownership state.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1d4ec754ee3871f7e3670c67bb0298c9c5760926 Patch
https://git.kernel.org/stable/c/20cf0fb715c41111469577e85e35d15f099473e0 Patch
https://git.kernel.org/stable/c/27040bbca289a704eafcacca167d310c6ce2b1bc Patch
https://git.kernel.org/stable/c/29d940026dce39e3018dab6f67c9427249321270 Patch
https://git.kernel.org/stable/c/2c5e5e4a5970c41f16e3ad801a78719ed5d5c71b Patch
https://git.kernel.org/stable/c/66cccec111421a10efdc2c74499d15b93e7acae5 Patch
https://git.kernel.org/stable/c/e7cf30aa5f1fc6c2a86df65df8b731df20e44d79 Patch
https://git.kernel.org/stable/c/f16ad421a4e3e7db2d14bdf3b16f583bc4f3b30a Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53355), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.